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United States Patent | 6,083,203 |
Yoon | July 4, 2000 |
An endoscopic portal includes a valve assembly disposed at an open proximal end of a sleeve or cannula providing access to an internal operative site, the valve assembly having a passage therethrough of variable size to engage surgical instruments passing therethrough in sealing relation to prevent flow or leakage of fluid through the valve assembly.
Inventors: | Yoon; InBae (2101 Highland Ridge Dr., Phoenix, MD 21131) |
Appl. No.: | 369240 |
Filed: | January 6, 1995 |
Current U.S. Class: | 604/167.01; 604/248 |
Intern'l Class: | A61B 017/32; A61B 019/00 |
Field of Search: | 604/158,159,160,161,162,163,164,165,166,167,168,169,170,248,264 |
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